CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 11085 > Article
Presentation + Paper
12 September 2019 Preparation of highly stability ZnxCd1-xS white light quantum dots by silica coating
Yun-Xuan Huang, Shu-Ru Chung
Author Affiliations +
Proceedings Volume 11085, Low-Dimensional Materials and Devices 2019; 110850H (2019) https://doi.org/10.1117/12.2529040
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States
Abstract
In this study, colloidal ternary ZnxCd1-xS (x=0.5 and 0.8, named as Zn0.5 and Zn0.8) white light quantum dots (WQDs) were prepared, which have the characteristics of band edge and surface state emissions, resulting in emitting white light. However, the low stability of device limits the application in solid state lighting (SSL). In order to solve the above problem, WQDs is coated with SiO2 to protect and passivate the surface. The results show that emission intensity of powder-typed Zn0.8 and Zn0.5 WQDs reduces to 40 % after four months at room temperature. On the other hand, the emission intensity of silica coating samples increase twice times compared to as-prepared sample. The luminous efficacy of as-prepared Zn0.8- based and Zn0.8@SiO2-based white light emitting diode (WLED) are 4.1 and 0.2 lm/W, respectively. The luminous efficacy of as-prepared Zn0.5-based and Zn0.5@SiO2-based white light emitting diode (WLED) are 8.1 and 6.2 lm/W, respectively. Moreover, the luminous efficacy of as-prepared Zn0.5-based WLED only maintains for one week, while the Zn0.5@SiO2- based devices can maintain for more than two weeks. These results confirm that coating SiO2 on the surface enhances the stability of WQDs and white light devices.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Yun-Xuan Huang and Shu-Ru Chung "Preparation of highly stability ZnxCd1-xS white light quantum dots by silica coating", Proc. SPIE 11085, Low-Dimensional Materials and Devices 2019, 110850H (12 September 2019); https://doi.org/10.1117/12.2529040
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 9 PAGES + PRESENTATION
DOWNLOAD PAPER SAVE TO MY LIBRARY
WATCH
PRESENTATION
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Silica
Coating
Quantum dots
Luminous efficacy
Solid state lighting
Light emitting diodes
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top